I have been an Airbnb host for a number of years. I recently lost my sweet youngest daughter (two months ago) to a heroin overdose (she did not live in my home) and have worked hard to help other addicts, as we are in the midst of an opioid crisis. I know what addiction looks like. I like to be helpful, but I no longer want it in my house!! I had a young female guest book for one person for two nights, and when she arrived she was obviously intoxicated. She went back out of the house to get "luggage" and came back in with a gangster type young man, and they proceeded to hole up in the room for the next two days. I called Airbnb and was told that if I cancelled the reservation, it would affect my Superhost status. Really? I was worried about theft (which is common among addicts) as well as messiness in the room (common as well), so I did not leave my home for the next two days. They were actually very quiet and the young man was polite. Addicted youth can be very nice people, they just need the help and no one seems to know how to help them.
When they left, the room was a mess as I had predicted, and the telltale smudges of heroin preparation were evident. Am not sure how to prevent this kind of thing in the future. Been there, done that, done.